<template>
	<ul>
		<li :style="{opacity}">欢迎学习Vue</li>
		<li>news001<input type="text"></li>
		<li>news002<input type="text"></li>
		<li>news003<input type="text"></li>
	</ul>
</template>

<script>

	export default {
		name:'UseNews',
		data(){
			return {
				opacity:1
			}
		},
				/* beforeDestroy() {
			console.log('News组件即将被销毁了')
			clearInterval(this.timer)
		}, */
		/* mounted(){
			this.timer = setInterval(() => {
				console.log('@')
				this.opacity -= 0.01
				if(this.opacity <= 0) this.opacity = 1
			},16)
		}, */
		activated(){
			console.log('News组件被激活了')
			this.timer= setInterval(()=>{
				console.log("-")
				this.opacity -= 0.01
				if(this.opacity <= 0){
					this.opacity =1
				}
			},16)
		},
		deactivated(){
			console.log('News组件失活了')
			clearInterval(this.timer)
		}
	}
</script>